package com.molichuxing.gateway.utils;

public class DesenseUtil {

	  private static final int SIZE = 9;
	    private static final String SYMBOL = "*";

	    public static String toConceal(String value) {
	        if (null == value || "".equals(value)) {
	            return value;
	        }
	        int len = value.length();
	        int pamaone = len / 2;
	        int pamatwo = pamaone - 1;
	        int pamathree = len % 2;
	        StringBuilder stringBuilder = new StringBuilder();
	        if (len <= 2) {
	            if (pamathree == 1) {
	                return SYMBOL;
	            }
	            stringBuilder.append(SYMBOL);
	            stringBuilder.append(value.charAt(len - 1));
	        } else {
	            if (pamatwo <= 0) {
	                stringBuilder.append(value.substring(0, 1));
	                stringBuilder.append(SYMBOL);
	                stringBuilder.append(value.substring(len - 1, len));

	            } else if (pamatwo >= SIZE / 2 && SIZE + 1 != len) {
	                int pamafive = (len - SIZE) / 2;
	                stringBuilder.append(value.substring(0, pamafive));
	                for (int i = 0; i < SIZE; i++) {
	                    stringBuilder.append(SYMBOL);
	                }
	                if ((pamathree == 0 && SIZE / 2 == 0) || (pamathree != 0 && SIZE % 2 != 0)) {
	                    stringBuilder.append(value.substring(len - pamafive, len));
	                } else {
	                    stringBuilder.append(value.substring(len - (pamafive + 1), len));
	                }
	            } else {
	                int pamafour = len - 2;
	                stringBuilder.append(value.substring(0, 1));
	                for (int i = 0; i < pamafour; i++) {
	                    stringBuilder.append(SYMBOL);
	                }
	                stringBuilder.append(value.substring(len - 1, len));
	            }
	        }
	        return stringBuilder.toString();

	    }
}
